"30 Rock" will welcome Kermit the Frog, Florence Henderson, Gayle King and Elaine Stritch in the Thursday, December 6 episode.

Titled "My Whole Life Is Thunder," the episode will see Jenna (Jane Krakowski) furious with Liz (Tina Fey) for stealing her wedding thunder. Meanwhile, Jack tries to come up with a plan to avoid disappointing Colleen (Stritch) and Tracy (Tracy Morgan) tries to cheer up Kenneth (Jack McBrayer) with the help of Florence Henderson.

In the photos below, see "The Brady Bunch" veteran in action, Kermit the Frog -- at a funeral? -- and Stritch playing Jack's mom, Colleen Donaghy.
"30 Rock" airs Thursdays, 8 p.m. EST on NBC.